Lifting-derrick.



N0,'772,586, l Y l BATBNTBD 0011-18, 1904?; H. .0. STONE, SR. & H. G. STONE, JR. LIPTING DBRRIGK.

APPLICATION FILED JULY 30, 1903.

N0 MODEL.

A PATENT Patented october 18, 1904.

OEEicE.

HENRY O. STONE, SR., OF EVANSTON, ILLINOIS, AND HENRY C. STONE, JR., OF SAN FRANOISCQCALIFORNIA; SAID STONE, SR., ASSIGNOR TO SAID STONE-JR.

LlFTlNG-DERFHCK- SPECIFICATION forming part of Letters Patent Ne. 772,586, dated oeteber 18, 1904.

Application filed ful) 30, 1903. Serial No. 16?;595. (No model.)

.To @ZZ wir/0m t may concern:

Be it known that we, HENRY C. STONE, Sr. residing at 919 Hinman avenue, Evanston, Illinois, and HENRY C. STONE, Jr., residing at 829% Sutter street, San Francisco, in the.

county of San Francisco and State of California, have invented a new and useful Improvement in Lifting-Derricks, of which the fol-- The accompanying sheet of drawings, tol

which reference will be made, is hereby made part of this specification.

Figure 1 is a side elevation of the machine with the anterior part of the tongue broken olf and also a medial portion of the mast or spar broken out. Fig. 2 is a detail portion of the lower mast and of the axle and wheels, showing the connection of these with the ground-frame. Fig. 3 is avertical View of the ground-frame, with part of the tongue broken off, Fig. 4 is a detail of the ratcheted pulley shown on the mast with its attachment to the same. Fig. 5 is a detail of the rope-guide, and the rope, showing such rope as in position about some burden to be compressedv before being raised, together with the attachment of such rope-guide to themast.

The construction ofthe bed-frame, Fig. 3, is preferably of angle-steel-say two and a half inches by two inches by one-,fourth inch.-

the'two side sills being bolted above the two cross-sills, a fiat face of each in. contact with the other, so that the cross-sills will rest with one of their sharp edges upon the ground and more or less cut into it, so resisting the sliding of the machine when in operation. J ust behind the posterior cross-sill and over the side sills is mounted a crank-axle held in place by l U bolts or clips bolted through the side sills and kept from endwise movement byv a pairof set-screw collars (not shown) mounted upon the axle justinside of the U-bolts. lThis crankaxle is made of, say, one-and-a-half-inch round steel and has a cranlrof about eight inches in to carry the hoisting-rope.

length at either end, then extends again straight to receive the hub of a transportwheel of, say, two feet in diameter, all as shown at c in Figs. 1 and 2. The rotation ofthe axle is controlted by a lever B, Fig. '1, mounted at right angles upon the axle andretained in place when the wheels are depressed by the retaining-hook c, Fig. 1. When this lever is thrown half around, it will rest for- .wardly upon the ground, raising the wheels from the ground, as indicated by the dotted lines in Fig. 1, so permitting the bed-frame of thederrick to rest upon the ground.

The proportional dimensions of the machine as here shown are about as follows: height 'of mast, fifteen feet; length of side sills, eight feet; projection of side sills beyond rear crosssill, five feet; distance apart of rear ends of side sills, about six feet; distance apart at front cross-sill, about five feet; total length of tongue, about thirteen feet.

'Above the middle of the rear cross-sill is erected a mast D, Figs. 1 and 2, in such a manner as to swing freely back and forward, braced against side movement by two hinged braces attached firmly to the mast about two feet above its foot and rotatably fixed to the side sills, as shown at E in Fig. 2. The backand-forth swing of the mast is limited by a brace with a sliding foot attached to the mast, at about three feet above its foot, at right angles to the other two braces and its foot or V lower end retained, by means of a :cross-pin, in a slideway about eight inches in length erected upon the upper surface of the tongue, about over the front4 cross-sill of the derrick, as shown at F, Fig. 1. The adjustment is such as to permit the mast to stand vertically yor assume an inclined position rearwardly to the extent that'its apex shall be vertically labove a line connecting the rear ends of the twoside sills. At the apex of this mast is located a groove'd wheel or pulley G, Fig. 1, At about three and one-half feet above the lower end of the mast there is attached to it another pulley of peculiar construction and function. This pulley H, Fig.' 1, isratcheted against turning backward. The rope in descending from the pulley at the top of the mast makes one complete turn or more about this pulley, for the purpose of absorbing power by rope friction when the weight is to be lowered, so insurl ing that the mast which swings to its most erect position whenthe weight is being raised will first swing to its most rearward position before the weight will descend by the relaxation of the rope, so insuring the deposition of the burden about five feet to the rearward of its point of suspension while being raised, this for depositing upon an adjacent vehicle or platform.

As it is the case that a certain class of burdens to be lifted are in their nature loose and ill-compacted and require for their being raised that they should be encircled by a cord or rope and lirst compressed horizontally, so that the rope should have a suicient hold and not slip off upwardly, therefore a device for accomplishing this end-aropeguide` as we term it-is attached to the side and rear face of the mast at a point about two and one-half feet above its foot, as shown at I, Fig. 1, and in detail in Fig. 5. This rope-guide consists of a piece of round steel-saythree-fourths inch in diameter, about fourteen inches long-bent at right angles, its longer arm mounted in bearings furnished by a clip bolted to the mast, permitting a turning movement of the free arm, which lies behind the mast and which carries at its free end the rope-guide casting, preferably ofbrass, under and behind which the rope is to be passed,so that for the time being its u pward pull will be converted into a horizontal pull until thehold of the rope upon the burden has been suitably tightened and the burden compressed. In order to release the rope at a proper time in the operation, this ropeguide is held down yieldingly by a spring of proper strength, coiled helically, of a length of about sixteen inches, the upper end of which engages the liange extension of the rope-guide casting below J, Fig. 5, and the lower end ofwhich spring is held adjustably by the set-lever and ratchet K, Fig. 1. rl`he springitself and its connections are shown at L, Fig. l. When the upward tension of the rope exceeds the resistance of this spring, the rope-guide will rotate upwardly, liberating the rope and permitting the burden to be raised by the pull of theteam on the rope to any height desired within the limit of the machine. By means of this set-lever holding the lower end of the spring the resistance of the rope-guide can be regulated at will.

1t is to be noted that all the attachments to the mast, except the side braces and the pulley at its apex, are attached adjustably, the

spring set-lever, while it is bolted tothe mast, the latter has a series of holes bored in it to permit of the level' being shifted up or down on the mast to correspond with change of position in the rope-guide above. There also is a heavy iron stop bolted to the rear face of the mast to receive. the impact from the recoil of the rope-guide when the rope is released. This also can be raised or lowered, as required, by means of a suitable series of bolt-holes bored in the mast.

le do not limit ourselves to the precise construction shown, especially in the matter of the axle, as a straight axle depressible in its entire length could easily be substituted for this crank-axle, and also the mechanism for controlling the position ol the wheels could easily be varied l any ordinary mechanic.

The derrick may also easily be adapted to be worked by a single animal instead ot a team of two by simply substituting a pair ol thills for the tongue.

Having so sulliciently described and explained our invention, whatwe claim as new and useful, and whatwe wish to secure by Letters Patent, is as follows:

l. In a lifting-derrick, a s\\'inging mast` limited in its swing by the sliding brace, and provided with the rope guide or tightener and ratcheted pulley, in combination with transport-wheels adjustable in position, in such a manner as to permit the derrick to rest upon the ground, or upon the wheels.

2. A rope guide or tightener, lirmly held against horizontal pull, and yieldingly held against upward pull.

3. ln a lifting-derriclc, the combination el the rope guide or tightener and spring, with means for adjusting the tension ol the spring.

4. ln a lifting-derrick, the combination ol the mast and lifting-cord, with the ratcheted pulley.

In a lifting-derricli, an :nitomatically back and forth swinging mast provided with a ratcheted pulley.

1n testimony whereof we have signed our names to this specilication in presence ol two witnesses for each one of us.

HENRY C. S'lONlC, Su. HENRY (l. STONE, Jn.

Titnesses as to signature of llenry (l. Stone, Sr.:

(i. A. PAUnnuscnnip'r, JULIA \V. NowrinN.

litnesses as to signature of llenry (l. Stone, Jr.:

( 1l none n PA'r'risoN E. E. KIRK.

lOO 

